CDCMCTrackStore Class Reference

Class to organize and present the monte carlo hit information. More...

#include <CDCMCTrackStore.h>

Collaboration diagram for CDCMCTrackStore:

Public Types
using	CDCHitVector = std::vector< const CDCHit * >
	Type for an ordered sequence of pointers to the CDCHit.

Public Member Functions
	CDCMCTrackStore ()=default
	Default constructor - for cppcheck.
	CDCMCTrackStore (CDCMCTrackStore &)=delete
	Singleton: Delete copy constructor and assignment operator.
CDCMCTrackStore &	operator= (const CDCMCTrackStore &)=delete
	Operator =.
void	clear ()
	Clear all Monte Carlo hits.
void	fill (const CDCMCMap *ptrMCMap, const CDCSimHitLookUp *ptrSimHitLookUp)
	Fill the store with the tracks from Monte Carlo information. More...
const std::map< ITrackType, Belle2::TrackFindingCDC::CDCMCTrackStore::CDCHitVector > &	getMCTracksByMCParticleIdx () const
	Getter for the stored Monte Carlo tracks ordered by their Monte Carlo Id.
const std::map< ITrackType, std::vector< Belle2::TrackFindingCDC::CDCMCTrackStore::CDCHitVector > > &	getMCSegmentsByMCParticleIdx () const
	Getter for the stored Monte Carlo segments ordered by their Monte Carlo Id.
Index	getInTrackId (const CDCHit *ptrHit) const
	Getter for the index of the hit within its track.
Index	getInTrackSegmentId (const CDCHit *ptrHit) const
	Getter for the index of the segment of the hit within its track.
Index	getNPassedSuperLayers (const CDCHit *ptrHit) const
	Getter for the number of super layers traversed until this hit.
Index	getNLoops (const CDCHit *ptrHit) const
	Getter for the number of traversed loops until this hit.

Static Public Member Functions
static const CDCMCTrackStore &	getInstance ()
	Getter for the singletone instance.

Private Member Functions
void	fillMCTracks ()
	Construct the tracks by grouping the hits by the mc particle id and sorted them for the FlightTime of the related CDCSimHits.
void	fillMCSegments ()
	Construct the segments by dividing the mc tracks in to disconnected parts and sorted them for the FlightTime of the related CDCSimHits.
void	arrangeMCTrack (CDCHitVector &mcTrack) const
	Sorts the given track for the FlightTime of the assoziated CDCSimHits. More...
void	fillInTrackId ()
	Fill the look up table for the in track index of each hit.
void	fillInTrackSegmentId ()
	Fill the look up table for the in track segment index of each hit.
void	fillNLoopsAndNPassedSuperLayers ()
	Fill the look up table of the number of traversed super layers until each hit.
bool	changedSuperLayer (const CDCHitVector &mcSegment, const CDCHitVector &nextMCSegment) const
	Helper function to decide whether the number of passed superlayers changed from one segment to the next. More...

Private Attributes
const CDCMCMap *	m_ptrMCMap
	Reference to the MC map of the current event.
const CDCSimHitLookUp *	m_ptrSimHitLookUp
	Reference to the CDCSimHit look up for additional information about related primary sim hits.
std::map< ITrackType, CDCHitVector >	m_mcTracksByMCParticleIdx
	The memory for the tracks made of CDCHits sorted for the time of flight and assoziated to the Monte Carlo particle id.
std::map< ITrackType, std::vector< CDCHitVector > >	m_mcSegmentsByMCParticleIdx
	The memory for the segments made of CDCHits sorted for the time of flight and assoziated to the Monte Carlo particle id.
std::map< const CDCHit *, int >	m_inTrackIds
	Look up table for index of the hit within its track.
std::map< const CDCHit *, int >	m_inTrackSegmentIds
	Look up table for index of the segment of the hits within their respective tracks.
std::map< const CDCHit *, int >	m_nPassedSuperLayers
	Look up table for the number of super layers the particle traversed before making the individual hit.
std::map< const CDCHit *, int >	m_nLoops
	Look up table for the number of loops the particle traversed before making the individual hit.

Detailed Description

Class to organize and present the monte carlo hit information.

Definition at line 28 of file CDCMCTrackStore.h.

Member Function Documentation

arrangeMCTrack()

void arrangeMCTrack ( CDCHitVector &  mcTrack ) const

private

Sorts the given track for the FlightTime of the assoziated CDCSimHits.

Sort with NaN as high.

Definition at line 235 of file CDCMCTrackStore.cc.

{
  if (not m_ptrMCMap) {
    B2WARNING("CDCMCMap not set. Cannot sort track");
    return;
  }
 
  const CDCSimHitLookUp& simHitLookUp = *m_ptrSimHitLookUp;
 
  std::stable_sort(mcTrack.begin(), mcTrack.end(),
  [&simHitLookUp](const CDCHit * ptrHit, const CDCHit * ptrOtherHit) -> bool {
 
    const CDCSimHit* ptrSimHit = simHitLookUp.getClosestPrimarySimHit(ptrHit);
    const CDCSimHit* ptrOtherSimHit = simHitLookUp.getClosestPrimarySimHit(ptrOtherHit);
 
    if (not ptrSimHit)
    {
      B2FATAL("No CDCSimHit for CDCHit");
    }
 
    if (not ptrOtherSimHit)
    {
      B2FATAL("No CDCSimHit for CDCHit");
    }
 
    double secondaryFlightTime =  ptrSimHit->getFlightTime();
    double otherSecondaryFlightTime =  ptrOtherSimHit->getFlightTime();
 
    return (secondaryFlightTime < std::fmin(INFINITY, otherSecondaryFlightTime));
  });
 
}

changedSuperLayer()

bool changedSuperLayer ( const CDCHitVector &  mcSegment, const CDCHitVector &  nextMCSegment  ) const

private

Helper function to decide whether the number of passed superlayers changed from one segment to the next.

The number of passed superlayers is easily detectable in a switch of the superlayer number form one segment to the next. An exception to this rule happens were particles are curling back exiting the super layer 0 and reentering the CDC super layer 0. There is no change of super layer number in this case since consecutive segments (only looking at the CDC) have the super layer number 0. Since this case would screw the evaluation of segment pair or triple selection we have to treat it seperatly.

Definition at line 341 of file CDCMCTrackStore.cc.

fill()

void fill	(	const CDCMCMap *	ptrMCMap,
		const CDCSimHitLookUp *	ptrSimHitLookUp
	)

Fill the store with the tracks from Monte Carlo information.

It uses the CDCMCMap to construct the Monte Carlo tracks.

Definition at line 52 of file CDCMCTrackStore.cc.

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The documentation for this class was generated from the following files:

• tracking/trackFindingCDC/mclookup/include/CDCMCTrackStore.h
• tracking/trackFindingCDC/mclookup/src/CDCMCTrackStore.cc